CN214671953U

CN214671953U - Armored power cable

Info

Publication number: CN214671953U
Application number: CN202121290362.0U
Authority: CN
Inventors: 罗国富; 谢玉磊
Original assignee: Jingguang Cable Group Co ltd
Current assignee: Jingguang Cable Group Co ltd
Priority date: 2021-06-10
Filing date: 2021-06-10
Publication date: 2021-11-09
Anticipated expiration: 2031-06-10

Abstract

The utility model discloses an armored power cable, which comprises a cable conductor, and further comprises an inner sheath, an armor layer and an outer sheath which surround the cable conductor, wherein the armor layer is arranged in the outer sheath, the outer wall of the armor layer is connected with the inner wall of the outer sheath and used for increasing the mechanical strength of the cable, the inner sheath surrounds the armor layer, the outer wall of the inner sheath is connected with the inner wall of the armor layer, the cable conductor is arranged in the inner sheath and is not less than two groups, a fireproof layer is filled between the cable conductor and the inner sheath, a plurality of bubble cavities are reserved at the end part of the fireproof layer, and the bubble cavities are filled with a metal sheath; what distinguish with traditional armor power cable is provided with the fire-retardant layer of protection between cable inner conductor and the sheath, and fire prevention fire-retardant layer tip is equipped with a plurality of air cavitys that fill fire-retardant material, can be when guaranteeing good normal heat dissipation of conductor and flame retardant efficiency, through the shrink of air cavity, makes cable body rope possess certain buffer capacity to stability and security when improving cable laying.

Description

Armored power cable

Technical Field

The utility model relates to a power cable technical field specifically is an armor power cable.

Background

A cable is a power or signal transmission device, and is generally composed of several wires or groups of wires. The cable includes power cable, control cable, compensation cable, shielding cable, high-temperature cable, computer cable, signal cable, armored cable, fire-resistant cable, marine cable, mining cable, aluminum alloy cable and the like. The armoured cable is made up by using different material conductors and placing them in a metal sleeve with insulating material, and making them into a flexible and firm combined body. The armored cable comprises an armored thermocouple, an armored thermal resistor, an armored heater and an armored lead wire, and is mainly used for temperature measurement, signal transmission and special heating in chemical engineering, metallurgy, mechanical manufacturing, power generation, scientific experiments and the like.

Because traditional armoured cable body is harder, lead to its shrink nature limited, when the cable body receives the impact from the external world, be in external armor very easily with power transmission to the line body in to carry out the extrusion formula friction to the line body, thereby bring certain destruction to the internal fire resistive construction of line, influence fire prevention effect, stability is not good, needs improve.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an armor power cable to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

an armored power cable comprises a cable conductor, an inner sheath, an armor layer and an outer sheath, wherein the inner sheath, the armor layer and the outer sheath are arranged around the cable conductor;

the armor layer is arranged in the outer sheath, and the outer wall of the armor layer is connected with the inner wall of the outer sheath and used for increasing the mechanical strength of the cable;

the inner protective ring is wound outside the armor layer, and the outer wall of the inner protective ring is connected with the inner wall of the armor layer;

two sets of are no less than to cable conductor in arranging the inner sheath in, and it has the flame retardant coating to fill between cable conductor and the inner sheath, and a plurality of bubble chambeies are left to the flame retardant coating tip, and the bubble chamber is filled there is fire-retardant granule.

Preferably, the outer sheath is a low smoke zero halogen sheath.

Preferably, the armor layer is made of single-stranded copper metal wires, and the copper metal wires spirally surround the wire body of the inner sheath and uniformly cover the outer surface of the inner sheath.

Preferably, the junction of the inner sheath outer wall and the armor inner wall is provided with a buffer layer, and the junction of the inner sheath inner wall and the fireproof layer outer wall is provided with a bundling layer.

Preferably, the buffer layer is made of low-smoke plastic materials.

Preferably, the bundling layer is a wrapping layer made of polypropylene resin.

Preferably, the cable conductor comprises a wire core, a mineral insulating layer and a metal sheath, wherein the mineral insulating layer is sleeved outside the wire core, the metal sheath is sleeved outside the mineral insulating layer, the inner wall of the metal sheath is connected with the outer wall of the metal sheath, and the outer wall of the metal sheath is connected with the fireproof layer.

Preferably, the cable conductor is located in the inner sheath and is divided into a first line group and a second line group, the first line group is arranged in the center of the fireproof layer, and the second line group is not less than one and is arranged around the first line group as the center.

Compared with the prior art, the beneficial effects of the utility model are that:

a protective flame-retardant layer is arranged between the inner conductor of the cable and the sheath, and a plurality of air cavities filled with flame-retardant materials are arranged at the end parts of the fireproof flame-retardant layer, so that the cable body rope can have certain buffering capacity through the contraction of the air cavities while the normal heat dissipation and flame-retardant effects of the good conductor are ensured, and the stability and the safety of the cable during laying are improved;

the armor encircles outside the online body for increase the mechanical strength of cable, improve anti-corrosion ability, can lay in the area that easily receives mechanical damage and very easily receive the erosion, the buffer layer of connecting on the inner sheath is used for protecting the inner sheath, the layer of restrainting then plays the effect of restrainting to the flame retardant coating, and cable conductor overcoat has mineral composite insulation layer in addition, has good working strength and fire resistance, long service life.

Drawings

Fig. 1 is a schematic structural diagram of an armored power cable.

Fig. 2 is a schematic structural diagram of an outer sheath in an armored power cable.

Fig. 3 is a schematic structural diagram of a fire-resistant layer in an armored power cable.

In the figure: 1. an outer sheath; 2. an armor layer; 3. an inner sheath; 301. a buffer layer; 302. a bundling layer; 4. a fire barrier layer; 401. a bubble chamber; 402. flame retardant particles; 5. a cable conductor; 501. a mineral insulation layer; 502. a metal sheath.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without any creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, in an embodiment of the present invention, an armored power cable includes a cable conductor 5, and further includes an inner sheath 3, an armor layer 2, and an outer sheath 1 surrounding the cable conductor 5, where the armor layer 2 is disposed in the outer sheath 1, and an outer wall of the armor layer is connected to an inner wall of the outer sheath 1 for increasing mechanical strength of the cable; the outer sheath 1 is a low-smoke halogen-free sheath; the inner sheath 3 surrounds the armor layer 2, and the outer wall of the inner sheath is connected with the inner wall of the armor layer 2;

at least two groups of cable conductors 5 are arranged in the inner sheath 3, a fireproof layer 4 is filled between the cable conductors 5 and the inner sheath 3, a plurality of bubble cavities 401 are reserved at the end part of the fireproof layer 4, and the bubble cavities 401 are filled with flame retardant particles 402; when the power cable is impacted and bent, the fireproof layer 4 in the cable can be subjected to double acting force of the cable conductor 5 and an external sheath, and at the moment, the arrangement of the bubble cavity 401 enables a large number of buffer cavities to exist in the fireproof layer 4, and when the power cable is impacted, the buffer cavities can absorb force through contraction, so that the stability of the cable is improved, wherein the flame-retardant particles 402 are filled in the bubble cavity 401 and used for supporting the body of the fireproof layer 4;

the armor layer 2 is made of single-stranded copper wires, the copper wires spirally surround the wire body of the inner sheath 3, and the outer surface of the inner sheath 3 is uniformly covered; the armor layer 2 surrounds the outside of the cable body, is used for increasing the mechanical strength of the cable, improving the anti-corrosion capability and can be laid in the areas which are easy to be damaged by machinery and easy to be corroded.

A buffer layer 301 is arranged at the joint of the outer wall of the inner sheath 3 and the inner wall of the armor layer 2, and a bundling layer 302 is arranged at the joint of the inner wall of the inner sheath 3 and the outer wall of the fireproof layer 4; the buffer layer 301 is made of low-smoke shaping materials; the bundling layer 302 is a wrapping layer made of polypropylene resin; the belting layer made of polypropylene resin surrounds the fireproof layer 4 to play a role in bundling the fireproof layer 4, and the buffer layer 301 is sleeved outside the inner sheath 3 and is in contact with the armor layer 2 to reduce impact friction generated between the armor layer 2 and the inner sheath 3;

the cable conductor 5 comprises a wire core, a mineral insulating layer 501 and a metal sheath 502, wherein the mineral insulating layer 501 is sleeved outside the wire core, the metal sheath 502 is sleeved outside the mineral insulating layer 501, the inner wall of the metal sheath is connected with the outer wall of the metal sheath 502, and the outer wall of the metal sheath is connected with the fireproof layer 4; the cable conductor 5 is positioned in the inner sheath 3 and is divided into a first line group and a second line group, the first line group is arranged at the center in the fireproof layer 4, and at least one second line group is arranged around the first line group as the center; the mineral insulating layer 501 and the metal sheath 502 form a mineral composite insulating layer of the cable conductor 5, and the two materials of copper and mineral insulation applied to the mineral insulating layer 501 and the metal sheath 502 in the mineral composite insulating layer are inorganic substances, so that the cable conductor can not burn and support combustion in use, can still continue to operate under the condition close to flame, and simultaneously has good working strength and toughness and long service life.

The utility model discloses a theory of operation is: when the power cable is impacted and bent, the fireproof layer 4 in the cable is subjected to double acting force of the cable conductor 5 and an external sheath, and the arrangement of the bubble cavity 401 enables a large number of buffer cavities to be formed in the fireproof layer 4, so that when the power cable is impacted, the buffer cavities can absorb the acting force to a certain extent through contraction, and meanwhile, the flame retardant particles 402 filled in the bubble cavity 401 are matched to support the body of the fireproof layer 4; therefore, the stability of the cable and the shock resistance of the cable are effectively enhanced, and the cable is safe and reliable.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. An armored power cable comprises a cable conductor (5), and is characterized by further comprising an inner sheath (3), an armor layer (2) and an outer sheath (1) which surround the cable conductor (5);

the armor layer (2) is arranged in the outer sheath (1), and the outer wall of the armor layer is connected with the inner wall of the outer sheath (1) and used for increasing the mechanical strength of the cable;

the inner sheath (3) surrounds the armor layer (2), and the outer wall of the inner sheath is connected with the inner wall of the armor layer (2);

the cable conductor (5) is arranged in the inner sheath (3) and is not less than two groups, a fireproof layer (4) is filled between the cable conductor (5) and the inner sheath (3), a plurality of bubble cavities (401) are reserved at the end part of the fireproof layer (4), and the bubble cavities (401) are filled with flame-retardant particles (402).

2. An armored power cable according to claim 1, characterized in that the outer sheath (1) is a low smoke zero halogen sheath.

3. An armoured power cable according to claim 1, characterized in that said armouring layer (2) is made of a single strand of copper metal wire helically wound around the outside of the body of the inner sheath (3) and uniformly covered on the outside surface of the inner sheath (3).

4. An armored power cable according to claim 1, wherein the junction between the outer wall of the inner sheath (3) and the inner wall of the armor layer (2) is provided with a buffer layer (301), and the junction between the inner wall of the inner sheath (3) and the outer wall of the fire-resistant layer (4) is provided with a bundling layer (302).

5. An armored power cable according to claim 4, wherein the buffer layer (301) is of low smoke plastic material.

6. An armoured power cable according to claim 4, characterized in that said bundling layer (302) is a wrapping layer made of polypropylene resin.

7. An armored power cable according to claim 1, wherein the cable conductor (5) comprises a core, a mineral insulating layer (501) and a metal sheath (502), the mineral insulating layer (501) is sleeved outside the core, the metal sheath (502) is sleeved outside the mineral insulating layer (501), the inner wall of the metal sheath is connected with the outer wall of the metal sheath (502), and the outer wall of the metal sheath is connected with the fire-proof layer (4).

8. An armored power cable according to claim 1, wherein the cable conductors (5) are divided into a first group and a second group within the inner sheath (3), the first group being centrally disposed within the flame retardant layer (4), and the second group being at least one and being disposed around the first group.